Optical imaging lens including six lenses of -++-+-, --+-+- or -++-++ refractive powers

ABSTRACT

The present invention provides an optical imaging lens. The optical imaging lens comprises six lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, such as convex peripheral portion on the object-side surface of the first lens element, convex peripheral portion on the image-side surface of the third lens element, convex peripheral portion on the object-side surface of the fifth lens element, concave peripheral portion on the object-side surface of the sixth lens element and convex peripheral portion on the image-side surface of the sixth lens element, and designing parameters satisfying at least one inequality, the optical imaging lens may shorten system length and promote thermal stability.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to P.R.C. Patent Application No.201910512176.8 titled “Optical Imaging Lens,” filed Jun. 13, 2019, withthe State Intellectual Property Office of the People's Republic of China(SIPO).

TECHNICAL FIELD

The present disclosure relates to optical imaging lenses, andparticularly, optical imaging lenses having, in some embodiments, sixlens elements.

BACKGROUND

As the specifications of mobile electronical devices, such as cellphones, digital cameras, tablet computers, personal digital assistants(PDA), etc. rapidly evolve, various types of key components, such asoptical imaging lenses, are developed. Desirable objectives fordesigning an optical imaging lens may not be limited to compact sizesand imaging quality, but may also include good optical characteristicsalong with short focus lengths and large view angles. Traditional lenseswith great view angles are usually bulky and heavy, or suffer from poordistortion aberrations. However, size reduction of an optical imaginglens may not be achieved simply by proportionally shrinking the size ofeach element therein. Various aspects of the optical imaging lens, suchas production difficulty, yield, material property, etc. should be takeninto consideration. Further, temperature difference in various kinds ofenvironment using the mobile electronical devices may generate focalshift of the optical imaging lenses, and then affect imaging quality.Accordingly, achieving good imaging quality in view of the variousrelevant considerations and technical barriers as well as sustaininggood thermal stability with stable focucal shift may be a challenge inthe industry.

SUMMARY

The present disclosure provides for optical imaging lenses showing goodimaging quality and being capable to provide a shortened system lengthand a promoted thermal stability.

In an example embodiment, an optical imaging lens may comprise six lenselements, hereinafter referred to as first, second, third, fourth, fifthand sixth lens elements and positioned sequentially from an object sideto an image side along an optical axis. Each of the first, second,third, fourth, fifth and sixth lens elements may also have anobject-side surface facing toward the object side and allowing imagingrays to pass through. Each of the first, second, third, fourth, fifthand sixth lens elements may also have an image-side surface facingtoward the image side and allowing the imaging rays to pass through.

In the specification, parameters used here are defined as follows: athickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis is represented by G12, a thickness of the second lenselement along the optical axis is represented by T2, a distance from theimage-side surface of the second lens element to the object-side surfaceof the third lens element along the optical axis is represented by G23,a thickness of the third lens element along the optical axis isrepresented by T3, a distance from the image-side surface of the thirdlens element to the object-side surface of the fourth lens element alongthe optical axis is represented by G34, a thickness of the fourth lenselement along the optical axis is represented by T4, a distance from theimage-side surface of the fourth lens element to the object-side surfaceof the fifth lens element along the optical axis is represented by G45,a thickness of the fifth lens element along the optical axis isrepresented by T5, a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by G56, a thickness of the sixth lenselement along the optical axis is represented by T6, a distance from thesixth lens element to a filtering unit along the optical axis isrepresented by G6F, a thickness of the filtering unit along the opticalaxis is represented by TTF, a distance from the filtering unit to animage plane along the optical axis is represented by GFP, a focal lengthof the first lens element is represented by f1, a focal length of thesecond lens element is represented by f2, a focal length of the thirdlens element is represented by f3, a focal length of the fourth lenselement is represented by f4, a focal length of the fifth lens elementis represented by f5, a focal length of the sixth lens element isrepresented by f6, the refractive index of the first lens element isrepresented by n1, the refractive index of the second lens element isrepresented by n2, the refractive index of the third lens element isrepresented by n3, the refractive index of the fourth lens element isrepresented by n4, the refractive index of the fifth lens element isrepresented by n5, the refractive index of the sixth lens element isrepresented by n6, an abbe number of the first lens element isrepresented by V1, an abbe number of the second lens element isrepresented by V2, an abbe number of the third lens element isrepresented by V3, an abbe number of the fourth lens element isrepresented by V4, an abbe number of the fifth lens element isrepresented by V5, an abbe number of the sixth lens element isrepresented by V6, a effective focal length of the optical imaging lensis represented by EFL, a distance from the object-side surface of thefirst lens element to the image-side surface of the sixth lens elementalong the optical axis is represented by TL, a distance from theobject-side surface of the first lens element to the image plane alongthe optical axis, i.e. a system length is represented by TTL, a sum ofthe thicknesses of all six lens elements along the optical axis, i.e. asum of T1, T2, T3, T4, T5 and T6 is represented by ALT, a sum of adistance from the image-side surface of the first lens element to theobject-side surface of the second lens element along the optical axis, adistance from the image-side surface of the second lens element to theobject-side surface of the third lens element along the optical axis, adistance from the image-side surface of the third lens element to theobject-side surface of the fourth lens element along the optical axis, adistance from the image-side surface of the fourth lens element to theobject-side surface of the fifth lens element along the optical axis anda distance from the image-side surface of the fifth lens element to theobject-side surface of the sixth lens element along the optical axis,i.e. a sum of G12, G23, G34, G45 and G56 is represented by AAG, a backfocal length of the optical imaging lens, which is defined as thedistance from the image-side surface of the sixth lens element to theimage plane along the optical axis, i.e. a sum of G6F, TTF and GFP isrepresented by BFL, a half field of view angle of the optical imaginglens is represented by HFOV, an image height of an image produced by theoptical imaging lens on an image plane is represented by ImgH, and af-number of the optical imaging lens is represented by Fno.

In an aspect of the present disclosure, in the optical imaging lens, thefirst lens element has negative refracting power, and a periphery regionof the object-side surface of the first lens element is convex, aperiphery region of the image-side surface of the third lens element isconvex; the fourth lens element has negative refracting power, aperiphery region of the object-side surface of the fifth lens element isconvex, a periphery region of the object-side surface of the sixth lenselement is concave, and a periphery region of the image-side surface ofthe sixth lens element is convex; lens elements having refracting powerof the optical imaging lens consist of the six lens elements describedabove; and the optical imaging lens satisfies the inequalities:(T1+G12+T2)/T5≤1.400  Inequality (1); andat least one ofV5/n5≤34.000  Inequality (2) andV3/n3≤34.000  Inequality (3).

In another aspect of the present disclosure, in the optical imaginglens, the first lens element has negative refracting power, and aperiphery region of the object-side surface of the first lens element isconvex, the fourth lens element has negative refracting power, aperiphery region of the object-side surface of the fifth lens element isconvex, a periphery region of the object-side surface of the sixth lenselement is concave, lens elements having refracting power of the opticalimaging lens consist of the six lens elements described above, and theoptical imaging lens satisfies Inequality (1) and Inequality (2). Insome of the embodiments of the invention, the optical imaging lens mayoptionally further comprise: an optical axis region of the image-sidesurface of the third lens element is convex, a periphery region of theimage-side surface of the third lens element is convex, an optical axisregion of the image-side surface of the fourth lens element is concave,a periphery region of the image-side surface of the fourth lens elementis concave, or the sixth lens element has negative refracting power.

In yet another aspect of the present disclosure, in the optical imaginglens, the first lens element has negative refracting power, and aperiphery region of the object-side surface of the first lens element isconvex, an optical axis region of the image-side surface of the thirdlens element is convex, the fourth lens element has negative refractingpower, a periphery region of the object-side surface of the fifth lenselement is convex, a periphery region of the object-side surface of thesixth lens element is concave, lens elements having refracting power ofthe optical imaging lens consist of the six lens elements describedabove; and the optical imaging lens satisfies Inequality (1) andInequality (3). In some of the embodiments of the invention, the opticalimaging lens may optionally further comprise: an optical axis region ofthe object-side surface of the second lens element is convex or aperiphery region of the image-side surface of the sixth lens element isconvex.

In yet another aspect of the present disclosure, in the optical imaginglens, the first lens element has negative refracting power, and aperiphery region of the object-side surface of the first lens element isconvex, the optical imaging lens has refracting power of the opticalimaging lens consist of the six lens elements described above, and theoptical imaging lens satisfies Inequality (2) and(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5)≤4.400  Inequality (4).

In another example embodiment, other inequality(s), such as thoserelating to the ratio among parameters could be taken intoconsideration. For example:EFL/(T1+G12)≤2.600  Inequality (5);EFL/(T1+G45)≤5.000  Inequality (6);EFL/(T1+G56)≤4.100  Inequality (7);EFL/(T2+G23)≤2.600  Inequality (8);EFL/(T3+G45)≤2.200  Inequality (9);EFL/T5≤2.200  Inequality (10);HFOV/ImgH≥20.000  Inequality (11);HFOV/TTL≥9.000  Inequality (12);HFOV/TL≥11.000  Inequality (13);ImgH*Fno/ALT≤1.900  Inequality (14);AAG*Fno/BFL≤3.100  Inequality (15);(T6+G12+G34)*Fno/T1≤6.000  Inequality (16);(T1+G23+G45+G56)/T6≤3.300  Inequality (17);(G23+T3+G34+T4)/(G12+T2)≤2.800  Inequality (18);(T6+G34+G56)/G23≤2.400  Inequality (19); and/orG max/G min≤11.000  Inequality (20).

In some example embodiments, more details about the convex or concavesurface structure, refracting power or chosen material etc. could beincorporated for one specific lens element or broadly for a plurality oflens elements to improve the control for the system performance and/orresolution. It is noted that the details listed herein could beincorporated in example embodiments if no inconsistency occurs.

The above example embodiments are not limiting and could be selectivelyincorporated in other embodiments described herein.

The optical imaging lens in example embodiments may achieve good imagingquality, such as good optical characteristics of lower distortionaberration, effectively shorten the system length and promote thethermal stability.

BRIEF DESCRIPTION OF THE DRAWINGS

Example embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 depicts a cross-sectional view of one single lens elementaccording to the present disclosure;

FIG. 2 depicts a cross-sectional view showing the relation between theshape of a portion and the position where a collimated ray meets theoptical axis;

FIG. 3 depicts a cross-sectional view showing a first example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 4 depicts a cross-sectional view showing a second example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 5 depicts a cross-sectional view showing a third example ofdetermining the shape of lens element regions and the boundaries ofregions;

FIG. 6 depicts a cross-sectional view of a first embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 7 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a first embodiment of the opticalimaging lens according to the present disclosure;

FIG. 8 depicts a table of optical data for each lens element of a firstembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 9 depicts a table of aspherical data of a first embodiment of theoptical imaging lens according to the present disclosure;

FIG. 10 depicts a cross-sectional view of a second embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 11 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a second embodiment of the opticalimaging lens according to the present disclosure;

FIG. 12 depicts a table of optical data for each lens element of theoptical imaging lens of a second embodiment of the present disclosure;

FIG. 13 depicts a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 depicts a cross-sectional view of a third embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 15 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a third embodiment of the opticalimaging lens according to the present disclosure;

FIG. 16 depicts a table of optical data for each lens element of theoptical imaging lens of a third embodiment of the present disclosure;

FIG. 17 depicts a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 depicts a cross-sectional view of a fourth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 19 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a fourth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 20 depicts a table of optical data for each lens element of theoptical imaging lens of a fourth embodiment of the present disclosure;

FIG. 21 depicts a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 depicts a cross-sectional view of a fifth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 23 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a fifth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 24 depicts a table of optical data for each lens element of theoptical imaging lens of a fifth embodiment of the present disclosure;

FIG. 25 depicts a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 depicts a cross-sectional view of a sixth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 27 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a sixth embodiment of the opticalimaging lens according the present disclosure;

FIG. 28 depicts a table of optical data for each lens element of theoptical imaging lens of a sixth embodiment of the present disclosure;

FIG. 29 depicts a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 depicts a cross-sectional view of a seventh embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 31 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a seventh embodiment of the opticalimaging lens according to the present disclosure;

FIG. 32 depicts a table of optical data for each lens element of aseventh embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 33 depicts a table of aspherical data of a seventh embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 34 depicts a cross-sectional view of an eighth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 35 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of an eighth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 36 depicts a table of optical data for each lens element of aneighth embodiment of an optical imaging lens according to the presentdisclosure;

FIG. 37 depicts a table of aspherical data of an eighth embodiment ofthe optical imaging lens according to the present disclosure;

FIG. 38 depicts a cross-sectional view of a ninth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 39 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a ninth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 40 depicts a table of optical data for each lens element of a ninthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 41 depicts a table of aspherical data of a ninth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 42 depicts a cross-sectional view of a tenth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 43 depicts a chart of a longitudinal spherical aberration and otherkinds of optical aberrations of a tenth embodiment of the opticalimaging lens according to the present disclosure;

FIG. 44 depicts a table of optical data for each lens element of a tenthembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 45 depicts a table of aspherical data of a tenth embodiment of theoptical imaging lens according to the present disclosure;

FIGS. 46, 47, 48 and 49 depict tables for the values of (T1+G12+T2)/T5,V5/n5, V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12),EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5,HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of all ten example embodiments.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons of ordinary skill in the arthaving the benefit of the present disclosure will understand othervariations for implementing embodiments within the scope of the presentdisclosure, including those specific examples described herein. Thedrawings are not limited to specific scale and similar reference numbersare used for representing similar elements. As used in the disclosuresand the appended claims, the terms “example embodiment,” “exemplaryembodiment,” and “present embodiment” do not necessarily refer to asingle embodiment, although it may, and various example embodiments maybe readily combined and interchanged, without departing from the scopeor spirit of the present disclosure. Furthermore, the terminology asused herein is for the purpose of describing example embodiments onlyand is not intended to be a limitation of the disclosure. In thisrespect, as used herein, the term “in” may include “in” and “on”, andthe terms “a”, “an” and “the” may include singular and pluralreferences. Furthermore, as used herein, the term “by” may also mean“from”, depending on the context. Furthermore, as used herein, the term“if” may also mean “when” or “upon”, depending on the context.Furthermore, as used herein, the words “and/or” may refer to andencompass any and all possible combinations of one or more of theassociated listed items.

The terms “optical axis region”, “periphery region”, “concave”, and“convex” used in this specification and claims should be interpretedbased on the definition listed in the specification by the principle oflexicographer.

In the present disclosure, the optical system may comprise at least onelens element to receive imaging rays that are incident on the opticalsystem over a set of angles ranging from parallel to an optical axis toa half field of view (HFOV) angle with respect to the optical axis. Theimaging rays pass through the optical system to produce an image on animage plane. The term “a lens element having positive refracting power(or negative refracting power)” means that the paraxial refracting powerof the lens element in Gaussian optics is positive (or negative). Theterm “an object-side (or image-side) surface of a lens element” refersto a specific region of that surface of the lens element at whichimaging rays can pass through that specific region. Imaging rays includeat least two types of rays: a chief ray Lc and a marginal ray Lm (asshown in FIG. 1). An object-side (or image-side) surface of a lenselement can be characterized as having several regions, including anoptical axis region, a periphery region, and, in some cases, one or moreintermediate regions, as discussed more fully below.

FIG. 1 is a radial cross-sectional view of a lens element 100. Tworeferential points for the surfaces of the lens element 100 can bedefined: a central point, and a transition point. The central point of asurface of a lens element is a point of intersection of that surface andthe optical axis I. As illustrated in FIG. 1, a first central point CP1may be present on the object-side surface 110 of lens element 100 and asecond central point CP2 may be present on the image-side surface 120 ofthe lens element 100. The transition point is a point on a surface of alens element, at which the line tangent to that point is perpendicularto the optical axis I. The optical boundary OB of a surface of the lenselement is defined as a point at which the radially outermost marginalray Lm passing through the surface of the lens element intersects thesurface of the lens element. All transition points lie between theoptical axis I and the optical boundary OB of the surface of the lenselement. If multiple transition points are present on a single surface,then these transition points are sequentially named along the radialdirection of the surface with reference numerals starting from the firsttransition point. For example, the first transition point, e.g., TP1,(closest to the optical axis I), the second transition point, e.g., TP2,(as shown in FIG. 4), and the Nth transition point (farthest from theoptical axis I).

The region of a surface of the lens element from the central point tothe first transition point TP1 is defined as the optical axis region,which includes the central point. The region located radially outside ofthe farthest Nth transition point from the optical axis I to the opticalboundary OB of the surface of the lens element is defined as theperiphery region. In some embodiments, there may be intermediate regionspresent between the optical axis region and the periphery region, withthe number of intermediate regions depending on the number of thetransition points.

The shape of a region is convex if a collimated ray being parallel tothe optical axis I and passing through the region is bent toward theoptical axis I such that the ray intersects the optical axis I on theimage side A2 of the lens element. The shape of a region is concave ifthe extension line of a collimated ray being parallel to the opticalaxis I and passing through the region intersects the optical axis I onthe object side A1 of the lens element.

Additionally, referring to FIG. 1, the lens element 100 may also have amounting portion 130 extending radially outward from the opticalboundary OB. The mounting portion 130 is typically used to physicallysecure the lens element to a corresponding element of the optical system(not shown). Imaging rays do not reach the mounting portion 130. Thestructure and shape of the mounting portion 130 are only examples toexplain the technologies, and should not be taken as limiting the scopeof the present disclosure. The mounting portion 130 of the lens elementsdiscussed below may be partially or completely omitted in the followingdrawings.

Referring to FIG. 2, optical axis region Z1 is defined between centralpoint CP and first transition point TP1. Periphery region Z2 is definedbetween TP1 and the optical boundary OB of the surface of the lenselement. Collimated ray 211 intersects the optical axis I on the imageside A2 of lens element 200 after passing through optical axis regionZ1, i.e., the focal point of collimated ray 211 after passing throughoptical axis region Z1 is on the image side A2 of the lens element 200at point R in FIG. 2. Accordingly, since the ray itself intersects theoptical axis I on the image side A2 of the lens element 200, opticalaxis region Z1 is convex. On the contrary, collimated ray 212 divergesafter passing through periphery region Z2. The extension line EL ofcollimated ray 212 after passing through periphery region Z2 intersectsthe optical axis I on the object side A1 of lens element 200, i.e., thefocal point of collimated ray 212 after passing through periphery regionZ2 is on the object side A1 at point M in FIG. 2. Accordingly, since theextension line EL of the ray intersects the optical axis I on the objectside A1 of the lens element 200, periphery region Z2 is concave. In thelens element 200 illustrated in FIG. 2, the first transition point TP1is the border of the optical axis region and the periphery region, i.e.,TP1 is the point at which the shape changes from convex to concave.

Alternatively, there is another way for a person having ordinary skillin the art to determine whether an optical axis region is convex orconcave by referring to the sign of “Radius” (the “R” value), which isthe paraxial radius of shape of a lens surface in the optical axisregion. The R value is commonly used in conventional optical designsoftware such as Zemax and CodeV. The R value usually appears in thelens data sheet in the software. For an object-side surface, a positiveR value defines that the optical axis region of the object-side surfaceis convex, and a negative R value defines that the optical axis regionof the object-side surface is concave. Conversely, for an image-sidesurface, a positive R value defines that the optical axis region of theimage-side surface is concave, and a negative R value defines that theoptical axis region of the image-side surface is convex. The resultfound by using this method should be consistent with the methodutilizing intersection of the optical axis by rays/extension linesmentioned above, which determines surface shape by referring to whetherthe focal point of a collimated ray being parallel to the optical axis Iis on the object-side or the image-side of a lens element. As usedherein, the terms “a shape of a region is convex (concave),” “a regionis convex (concave),” and “a convex- (concave-) region,” can be usedalternatively.

FIG. 3, FIG. 4 and FIG. 5 illustrate examples of determining the shapeof lens element regions and the boundaries of regions under variouscircumstances, including the optical axis region, the periphery region,and intermediate regions as set forth in the present specification.

FIG. 3 is a radial cross-sectional view of a lens element 300. Asillustrated in FIG. 3, only one transition point TP1 appears within theoptical boundary OB of the image-side surface 320 of the lens element300. Optical axis region Z1 and periphery region Z2 of the image-sidesurface 320 of lens element 300 are illustrated. The R value of theimage-side surface 320 is positive (i.e., R>0). Accordingly, the opticalaxis region Z1 is concave.

In general, the shape of each region demarcated by the transition pointwill have an opposite shape to the shape of the adjacent region(s).Accordingly, the transition point will define a transition in shape,changing from concave to convex at the transition point or changing fromconvex to concave. In FIG. 3, since the shape of the optical axis regionZ1 is concave, the shape of the periphery region Z2 will be convex asthe shape changes at the transition point TP1.

FIG. 4 is a radial cross-sectional view of a lens element 400. Referringto FIG. 4, a first transition point TP1 and a second transition pointTP2 are present on the object-side surface 410 of lens element 400. Theoptical axis region Z1 of the object-side surface 410 is defined betweenthe optical axis I and the first transition point TP1. The R value ofthe object-side surface 410 is positive (i.e., R>0). Accordingly, theoptical axis region Z1 is convex.

The periphery region Z2 of the object-side surface 410, which is alsoconvex, is defined between the second transition point TP2 and theoptical boundary OB of the object-side surface 410 of the lens element400. Further, intermediate region Z3 of the object-side surface 410,which is concave, is defined between the first transition point TP1 andthe second transition point TP2. Referring once again to FIG. 4, theobject-side surface 410 includes an optical axis region Z1 locatedbetween the optical axis I and the first transition point TP1, anintermediate region Z3 located between the first transition point TP1and the second transition point TP2, and a periphery region Z2 locatedbetween the second transition point TP2 and the optical boundary OB ofthe object-side surface 410. Since the shape of the optical axis regionZ1 is designed to be convex, the shape of the intermediate region Z3 isconcave as the shape of the intermediate region Z3 changes at the firsttransition point TP1, and the shape of the periphery region Z2 is convexas the shape of the periphery region Z2 changes at the second transitionpoint TP2.

FIG. 5 is a radial cross-sectional view of a lens element 500. Lenselement 500 has no transition point on the object-side surface 510 ofthe lens element 500. For a surface of a lens element with no transitionpoint, for example, the object-side surface 510 the lens element 500,the optical axis region Z1 is defined as the region between 0-50% of thedistance between the optical axis I and the optical boundary OB of thesurface of the lens element and the periphery region is defined as theregion between 50%-100% of the distance between the optical axis I andthe optical boundary OB of the surface of the lens element. Referring tolens element 500 illustrated in FIG. 5, the optical axis region Z1 ofthe object-side surface 510 is defined between the optical axis I and50% of the distance between the optical axis I and the optical boundaryOB. The R value of the object-side surface 510 is positive (i.e., R>0).Accordingly, the optical axis region Z1 is convex. For the object-sidesurface 510 of the lens element 500, because there is no transitionpoint, the periphery region Z2 of the object-side surface 510 is alsoconvex. It should be noted that lens element 500 may have a mountingportion (not shown) extending radially outward from the periphery regionZ2.

In the present disclosure, examples of an optical imaging lens which maybe a prime lens are provided. Example embodiments of an optical imaginglens may comprise a first lens element, a second lens element, a thirdlens element, a fourth lens element, a fifth lens element and a sixthlens element. Each of the lens elements may comprise an object-sidesurface facing toward an object side allowing imaging rays to passthrough and an image-side surface facing toward an image side allowingthe imaging rays to pass through. These lens elements may be arrangedsequentially from the object side to the image side along an opticalaxis, and example embodiments of the lens may have refracting power ofthe optical imaging lens consist of the six lens elements describedabove. Through controlling shape of the surfaces and range of theparameters, the optical imaging lens in example embodiments may achievegood imaging quality, effectively shorten the system length and promotethe thermal stability.

In some embodiments, the lens elements are designed in light of theoptical characteristics, the system length and the thermal stability ofthe optical imaging lens. For example, with the negative refractingpower of the first lens element, the convex periphery region of theobject-side surface of the first lens element, or the concave opticalaxis region or the concave periphery region of the image-side surface ofthe first lens element, it may be beneficial to enlarge the half fieldof view angle of the optical imaging lens. With the negative refractingpower of the fourth lens element, the convex periphery region of theobject-side surface of the fifth lens element, or the concave peripheryregion of the object-side surface of the sixth lens element, it may bebeneficial to enlarge the half field of view angle as well as adjust theaberrations of the optical imaging lens. With the convex optical axisregion of the image-side surface of the third lens element, the convexperiphery region of the image-side surface of the third lens element,the concave optical axis region of the image-side surface of the fourthlens element, the concave periphery region of the image-side surface ofthe fourth lens element, or the negative refracting power of the sixthlens element, it may be beneficial to enlarge the half field of viewangle as well as adjust the distortion aberration of the optical imaginglens.

When the optical imaging lens further satisfies V5/n5≤34.000 orV3/n3≤34.000 and fulfills some limitations of surface shape, it may bebeneficial to sustain the focal shift at 0° C. within ±0.015 mm and thefocal shift at 60° C. within ±0.030 mm. Preferably, the optical imaginglens may satisfy 10.000≤V5/n5≤34.000 or 10.000≤V3/n3≤34.000, and in anoptimized case, the optical imaging lens may satisfy 10.000≤V5/n5≤34.000to present the focal shift at 0° C. as being within ±0.002 mm and thefocal shift at 60° C. as being within ±0.010 mm.

When the optical imaging lens further satisfies HFOV/ImgH≥20.000°/mm, itmay be beneficial to sustain the value of HFOV and promote resolution ofan image sensor. Preferably, the optical imaging lens may satisfy20.000≤HFOV/ImgH≤28.000°/mm.

When the optical imaging lens further satisfies HFOV/TTL≥9.000°/mm orHFOV/TL≥11.000°/mm, it may be beneficial to sustain the value of HFOVand shorten the system length. Preferably, the optical imaging lens maysatisfy 9.000°/mm≤HFOV/TTL≤15.000°/mm or 11.000°/mm≤HFOV/TL≤20.000°/mm.

When the optical imaging lens further satisfies EFL/(T1+G12)≤2.600,EFL/(T1+G45)≤5.000, EFL/(T1+G56)≤4.100, EFL/(T2+G23)≤2.600,EFL/(T3+G45)≤2.200 or EFL/T5≤2.200, it may be beneficial to sustain aproper value value for system focal length and parameters, avoid anyexcessive value of the parameters which may be unfavorable to theadjustment of the aberration of the whole system of the optical imaginglens, or avoid any insufficient value of the parameters which mayincrease the production difficulty of the optical imaging lens.Preferably, the optical imaging lens may satisfy at least one of0.900≤EFL/(T1+G12)≤2.600, 1.200≤EFL/(T1+G45)≤5.000,1.200≤EFL/(T1+G56)≤4.100, 0.650≤EFL/(T2+G23)≤2.600,0.800≤EFL/(T3+G45)≤2.200, 0.500≤EFL/T5≤2.200.

When the optical imaging lens further satisfies at least one of(T1+G12+T2)/T5≤1.400, ImgH*Fno/ALT≤1.900, AAG*Fno/BFL≤3.100,(T6+G12+G34)*Fno/T1≤6.000, (T1+G23+G45+G56)/T6≤3.300,(G23+T3+G34+T4)/(G12+T2)≤2.800, (T6+G34+G56)/G23≤2.400,(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5)≤4.400 or G max/G min≤11.000, thethickness of the lens elements and/or the air gaps between the lenselements may be shortened properly to avoid any excessive value of theparameters which may be unfavorable and may thicken the system length ofthe whole system of the optical imaging lens, and to avoid anyinsufficient value of the parameters which may increase the productiondifficulty of the optical imaging lens. Preferably, the optical imaginglens may satisfy at least one of 0.500≤(T1+G12+T2)/T5≤1.400,0.600≤ImgH*Fno/ALT≤1.900, 0.750≤AAG*Fno/BFL≤3.100,1.500≤(T6+G12+G34)*Fno/T1≤6.000, 1.350≤(T1+G23+G45+G56)/T6≤3.300,0.750≤(G23+T3+G34+T4)/(G12+T2)≤2.800, 0.500≤(T6+G34+G56)/G23≤2.400,1.500≤(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5)≤4.400, 3.000≤G max/Gmin≤11.000.

In light of the unpredictability in an optical system, satisfying theseinequalities listed above may result in shortening the system length ofthe optical imaging lens, lowering the f-number, enlarging the shotangle, promoting the imaging quality and/or increasing the yield in theassembly process in the present disclosure.

When implementing example embodiments, more details about the convex orconcave surface or refracting power could be incorporated for onespecific lens element or broadly for a plurality of lens elements toimprove the control for the system performance and/or resolution, orpromote the yield. For example, in an example embodiment, each lenselement may be made from all kinds of transparent material, such asglass, resin, etc. It is noted that the details listed here could beincorporated in example embodiments if no inconsistency occurs.

Several example embodiments and associated optical data will now beprovided for illustrating example embodiments of an optical imaging lenswith a short system length, good optical characteristics, a wide viewangle and/or a low f-number. Reference is now made to FIGS. 6-9. FIG. 6illustrates an example cross-sectional view of an optical imaging lens 1having six lens elements of the optical imaging lens according to afirst example embodiment. FIG. 7 shows example charts of a longitudinalspherical aberration and other kinds of optical aberrations of theoptical imaging lens 1 according to an example embodiment. FIG. 8illustrates an example table of optical data of each lens element of theoptical imaging lens 1 according to an example embodiment. FIG. 9depicts an example table of aspherical data of the optical imaging lens1 according to an example embodiment.

As shown in FIG. 6, the optical imaging lens 1 of the present embodimentmay comprise, in the order from an object side A1 to an image side A2along an optical axis, a first lens element L1, a second lens elementL2, an aperture stop STO, a third lens element L3, a fourth lens elementL4, a fifth lens element L5 and a sixth lens element L6. A filteringunit TF and an image plane IMA of an image sensor may be positioned atthe image side A2 of the optical lens 1. Each of the first, second,third, fourth, fifth and sixth lens elements L1, L2, L3, L4, L5, L6 andthe filtering unit TF may comprise an object-side surfaceL1A1/L2A1/L3A1/L4A1/L5A1/L6A1/TFA1 facing toward the object side A1 andan image-side surface L1A2/L2A2/L3A2/L4A2/L5A2/L6A2/TFA2 facing towardthe image side A2. The filtering unit TF, positioned between the sixthlens element L6 and the image plane IMA, may selectively absorb lightwith specific wavelength(s) from the light passing through opticalimaging lens 1. The example embodiment of the filtering unit TF whichmay selectively absorb light with specific wavelength(s) from the lightpassing through optical imaging lens 1 may be an IR cut filter (infraredcut filter). Then, IR light may be absorbed, and this may prohibit theIR light, which might not be seen by human eyes, from producing an imageon the image plane IMA.

Please note that during the normal operation of the optical imaging lens1, the distance between any two adjacent lens elements of the first,second, third, fourth, fifth and sixth lens elements L1, L2, L3, L4, L5,and L6 may be an unchanged value, i.e. the optical imaging lens 1 may bea prime lens.

Example embodiments of each lens element of the optical imaging lens 1,which may be constructed by glass, plastic material or other transparentmaterial, will now be described with reference to the drawings.

An example embodiment of the first lens element L1, which may beconstructed by plastic material, may have negative refracting power. Onthe object-side surface L1A1, an optical axis region L1A1C may beconcave and a periphery region L1A1P may be convex. On the image-sidesurface L1A2, an optical axis region L1A2C may be concave and aperiphery region L1A2P may be concave. Both the object-side surface L1A1and the image-side surface L1A2 of the optical imaging lens 1 areaspherical surfaces.

An example embodiment of the second lens element L2, which may beconstructed by plastic material, may have positive refracting power. Onthe object-side surface L2A1, an optical axis region L2A1C may be convexand a periphery region L2A1P may be convex. On the image-side surfaceL2A2, an optical axis region L2A2C may be concave and a periphery regionL2A2P may be concave. Both the object-side surface L2A1 and theimage-side surface L2A2 of the optical imaging lens 1 are asphericalsurfaces.

An example embodiment of the third lens element L3, which may beconstructed by plastic material, may have positive refracting power. Onthe object-side surface L3A1, an optical axis region L3A1C may be convexand a periphery region L3A1P may be convex. On the image-side surfaceL3A2, an optical axis region L3A2C may be convex and a periphery regionL3A2P may be convex. Both the object-side surface L3A1 and theimage-side surface L3A2 of the optical imaging lens 1 are asphericalsurfaces.

An example embodiment of the fourth lens element L4, which may beconstructed by plastic material, may have negative refracting power. Onthe object-side surface L4A1, an optical axis region L4A1C may be convexand a periphery region L4A1P may be concave. On the image-side surfaceL4A2, an optical axis region L4A2C may be concave and a periphery regionL4A2P may be concave. Both the object-side surface L4A1 and theimage-side surface L4A2 of the optical imaging lens 1 are asphericalsurfaces.

An example embodiment of the fifth lens element L5, which may beconstructed by glass material, may have positive refracting power. Onthe object-side surface L5A1, an optical axis region L5A1C may beconcave and a periphery region L5A1P may be convex. On the image-sidesurface L5A2, an optical axis region L5A2C may be convex and a peripheryregion L5A2P may be convex. Both the object-side surface L5A1 and theimage-side surface L5A2 of the optical imaging lens 1 are asphericalsurfaces.

An example embodiment of the sixth lens element L6, which may beconstructed by plastic material, may have negative refracting power. Onthe object-side surface L6A1, an optical axis region L6A1C may be convexand a periphery region L6A1P may be concave. On the image-side surfaceL6A2, an optical axis region L6A2C may be concave and a periphery regionL6A2P may be convex. Both the object-side surface L6A1 and theimage-side surface L6A2 of the optical imaging lens 1 are asphericalsurfaces.

In example embodiments, air gaps may exist between each pair of adjacentlens elements, as well as between the sixth lens element L6 and thefiltering unit TF, and the filtering unit TF and the image plane IMA ofthe image sensor. Please note, in other embodiments, any of theaforementioned air gaps may or may not exist. For example, profiles ofopposite surfaces of a pair of adjacent lens elements may align withand/or attach to each other, and in such situations, the air gap mightnot exist.

FIG. 8 depicts the optical characteristics of each lens elements in theoptical imaging lens 1 of the present embodiment. Please also refer toFIGS. 46 and 47 for the values of (T1+G12+T2)/T5, V5/n5, V3/n3,(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12), EFL/(T1+G45),EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5, HFOV/ImgH, HFOV/TTL,HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL, (T6+G12+G34)*Fno/T1,(T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2), (T6+G34+G56)/G23 and Gmax/G min corresponding to the present embodiment.

The aspherical surfaces, including the object-side surface L1A1 and theimage-side surface L1A2 of the first lens element L1, the object-sidesurface L2A1 and the image-side surface L2A2 of the second lens elementL2, the object-side surface L3A1 and the image-side surface L3A2 of thethird lens element L3, the object-side surface L4A1 and the image-sidesurface L4A2 of the fourth lens element L4, the object-side surface L5A1and the image-side surface L5A2 of the fifth lens element L5 and theobject-side surface L6A1 and the image-side surface L6A2 of the sixthlens element L6 may all be defined by the following aspherical formula:

${Z(Y)} = {{\frac{Y^{2}}{R}/\left( {1 + \sqrt{1 - {\left( {1 + K} \right)\frac{Y^{2}}{R^{2}}}}} \right)} + {\sum\limits_{i = 1}^{n}{a_{i} \times Y^{i}}}}$wherein, Y represents the perpendicular distance between the point ofthe aspherical surface and the optical axis; Z represents the depth ofthe aspherical surface (the perpendicular distance between the point ofthe aspherical surface at a distance Y from the optical axis and thetangent plane of the vertex on the optical axis of the asphericalsurface); R represents the radius of curvature of the surface of thelens element; K represents a conic constant; a_(i) represents anaspherical coefficient of i^(th) level. The values of each asphericalparameter are shown in FIG. 9.

Referring to FIG. 7(A), a longitudinal spherical aberration of theoptical imaging lens in the present embodiment is shown in coordinatesin which the horizontal axis represents focus and the vertical axisrepresents field of view, and FIG. 7(B), curvature of field of theoptical imaging lens in the present embodiment in the sagittal directionis shown in coordinates in which the horizontal axis represents focusand the vertical axis represents image height, and FIG. 7(C), curvatureof field in the tangential direction of the optical imaging lens in thepresent embodiment is shown in coordinates in which the horizontal axisrepresents curvature of field and the vertical axis represents imageheight, and FIG. 7(D), distortion aberration of the optical imaging lensin the present embodiment is shown in coordinates in which thehorizontal axis represents percentage and the vertical axis representsimage height.

The curves of different wavelengths (470 nm, 555 nm, 650 nm) may beclose to each other. This represents that off-axis light with respect tothese wavelengths may be focused around an image point. From thevertical deviation of each curve shown therein, the offset of theoff-axis light relative to the image point may be within about−0.018˜0.010 mm. Therefore, the present embodiment may improve thelongitudinal spherical aberration with respect to different wavelengths.For curvature of field in the sagittal direction, the focus variationwith respect to the three wavelengths in the whole field may fall withinabout −0.02˜0.03 mm, for curvature of field in the tangential direction,the focus variation with respect to the three wavelengths in the wholefield may fall within about −0.02˜0.045 mm, and the variation of thedistortion aberration may be within about −5˜8%.

The focal shift of the optical imaging lens 1 may be slightly changedbetween −0.0015 mm (at 60° C.) and −0.002 mm (at 0° C.), where −0.0015mm is measured at 20° C., deemed as reference temperature. According tothe values of the aberrations, it is shown that the optical imaging lens1 of the present embodiment, with the HFOV as large as about 60.657degrees, Fno as small as 2.019 and the system length as short as about6.499 mm, may be capable of providing good imaging quality, opticalcharacteristics and thermal stability.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 2 having six lenselements of the optical imaging lens according to a second exampleembodiment. FIG. 11 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 2 according to the second example embodiment. FIG. 12 shows anexample table of optical data of each lens element of the opticalimaging lens 2 according to the second example embodiment. FIG. 13 showsan example table of aspherical data of the optical imaging lens 2according to the second example embodiment.

As shown in FIG. 10, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the second embodiment and the first embodimentmay include the radius of curvature, thickness of each lens element, thevalue of each air gap, aspherical data, related optical parameters, suchas back focal length, and the configuration of the concave/convex shapeof the object-side surfaces L4A1, L5A1 and the image-side surface L4A2;but the configuration of the concave/convex shape of surfaces,comprising the object-side surfaces L1A1, L2A1, L3A1 and L6A1 facing tothe object side A1 and the image-side surfaces L1A2, L2A2, L3A2, L5A2and L6A2 facing to the image side A2, and positive or negativeconfiguration of the refracting power of each lens element may besimilar to those in the first embodiment. Here and in the embodimentshereinafter, for clearly showing the drawings of the present embodiment,only the surface shapes which are different from that in the firstembodiment may be labeled. Specifically, the differences ofconfiguration of surface shape may include: an optical axis region L4A1Con the object-side surface L4A1 of the fourth lens element L4 may beconcave, a periphery region L4A2P on the image-side surface L4A2 of thefourth lens element L4 may be convex, and an optical axis region L5A1Con the object-side surface L5A1 of the fifth lens element L5 may beconvex. Please refer to FIG. 12 for the optical characteristics of eachlens elements in the optical imaging lens 2 of the present embodiment,and please refer to FIGS. 46 and 47 for the values of (T1+G12+T2)/T5,V5/n5, V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12),EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5,HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 11(A), the offsetof the off-axis light relative to the image point may be within about−0.018˜0.010 mm. As the curvature of field in the sagittal directionshown in FIG. 11(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.035˜0.025 mm. Asthe curvature of field in the tangential direction shown in FIG. 11(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.04˜0.05 mm. As shown in FIG. 11(D), thevariation of the distortion aberration may be within about −40˜0%.

The focal shift of the optical imaging lens 2 may be slightly changedbetween −0.0045 mm (at 60° C.) and 0 mm (at 0° C.), where −0.001 mm ismeasured at 20° C., deemed as reference temperature. According to thevalues of the aberrations, it is shown that the optical imaging lens 2of the present embodiment, with the HFOV as large as about 64.641degrees, Fno as small as 2.019 and the system length as short as about5.572 mm, may be capable of providing good imaging quality, opticalcharacteristics and thermal stability. Compared with the firstembodiment, the HFOV may be greater and the system length may be shorterin the present embodiment.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 3 having six lenselements of the optical imaging lens according to a third exampleembodiment. FIG. 15 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 3 according to the third example embodiment. FIG. 16 shows anexample table of optical data of each lens element of the opticalimaging lens 3 according to the third example embodiment. FIG. 17 showsan example table of aspherical data of the optical imaging lens 3according to the third example embodiment.

As shown in FIG. 14, the optical imaging lens 3 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the third embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surface L4A1 and the image-side surface L4A2;but the configuration of the concave/convex shape of surfaces,comprising the object-side surfaces L1A1, L2A1, L3A1, L5A1 and L6A1facing to the object side A1 and the image-side surfaces L1A2, L2A2,L3A2, L5A2 and L6A2 facing to the image side A2, and positive ornegative configuration of the refracting power of each lens element maybe similar to those in the first embodiment. Specifically, thedifferences of configuration of surface shape may include: an opticalaxis region L4A1C on the object-side surface L4A1 of the fourth lenselement L4 may be concave, and a periphery region L4A2P on theimage-side surface L4A2 of the fourth lens element L4 may be convex.Please refer to FIG. 16 for the optical characteristics of each lenselements in the optical imaging lens 3 of the present embodiment, andplease refer to FIGS. 46 and 47 for the values of (T1+G12+T2)/T5, V5/n5,V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12),EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5,HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 15(A), the offsetof the off-axis light relative to the image point may be within about−0.016˜0.012 mm. As the curvature of field in the sagittal directionshown in FIG. 15(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.03˜0.015 mm. Asthe curvature of field in the tangential direction shown in FIG. 15(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.035˜0.035 mm. As shown in FIG. 15(D), thevariation of the distortion aberration may be within about −14˜6%.

The focal shift of the optical imaging lens 3 may be slightly changedbetween −0.0015 mm (at 60° C.) and 0 mm (at 0° C.), where 0 mm ismeasured at 20° C., deemed as reference temperature. According to thevalues of the aberrations, it is shown that the optical imaging lens 3of the present embodiment, with the HFOV as large as about 64.641degrees, Fno as small as 2.019 and the system length as short as about5.419 mm, may be capable of providing good imaging quality, opticalcharacteristics and thermal stability. Compared with the firstembodiment, the HFOV may be greater and the system length of the opticalimaging lens 3 in the present embodiment may be shorter.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 4 having six lenselements of the optical imaging lens according to a fourth exampleembodiment. FIG. 19 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 4 according to the fourth embodiment. FIG. 20 shows an exampletable of optical data of each lens element of the optical imaging lens 4according to the fourth example embodiment. FIG. 21 shows an exampletable of aspherical data of the optical imaging lens 4 according to thefourth example embodiment.

As shown in FIG. 18, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the fourth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surfaces L4A1, L5A1 and the image-side surfaceL4A2; but the configuration of the concave/convex shape of surfaces,comprising the object-side surfaces L1A1, L2A1 and L6A1 facing to theobject side A1 and the image-side surfaces L1A2, L2A2, L3A2, L5A2 andL6A2 facing to the image side A2, and positive or negative configurationof the refracting power of each lens element may be similar to those inthe first embodiment. Specifically, the differences of configuration ofsurface shape may include: an optical region L4A1C on the object-sidesurface L4A1 of the fourth lens element L4 may be concave, a peripheryregion L4A2P on the image-side surface L4A2 of the fourth lens elementL4 may be convex, and an optical region L5A1C on the object-side surfaceL5A1 of the fifth lens element L5 may be convex. Please refer to FIG. 20for the optical characteristics of each lens elements in the opticalimaging lens 4 of the present embodiment, please refer to FIGS. 46 and47 for the values of (T1+G12+T2)/T5, V5/n5, V3/n3,(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12), EFL/(T1+G45),EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5, HFOV/ImgH, HFOV/TTL,HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL, (T6+G12+G34)*Fno/T1,(T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2), (T6+G34+G56)/G23 and Gmax/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 19(A), the offsetof the off-axis light relative to the image point may be within about−0.014˜0.004 mm. As the curvature of field in the sagittal directionshown in FIG. 19(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.02˜0.02 mm. Asthe curvature of field in the tangential direction shown in FIG. 19(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.02˜0.06 mm. As shown in FIG. 19(D), thevariation of the distortion aberration may be within about 14˜16%.Compared with the first embodiment, the longitudinal sphericalaberration and the curvature of field in the sagittal direction may besmaller in the present embodiment.

The focal shift of the optical imaging lens 4 may be slightly changedbetween −0.0025 mm (at 60° C.) and 0 mm (at 0° C.), where −0.0005 mm ismeasured at 20° C., deemed as reference temperature. According to thevalues of the aberrations, it is shown that the optical imaging lens 4of the present embodiment, with the HFOV as large as about 60.027degrees, Fno as small as 2.019 and the system length as short as about6.483 mm, may be capable of providing good imaging quality, opticalcharacteristics and thermal stability. Compared with the optical imaginglens 1 of the first embodiment, the system length of the optical imaginglens 4 in the present embodiment may be shorter.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 5 having six lenselements of the optical imaging lens according to a fifth exampleembodiment. FIG. 23 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 5 according to the fifth embodiment. FIG. 24 shows an example tableof optical data of each lens element of the optical imaging lens 5according to the fifth example embodiment. FIG. 25 shows an exampletable of aspherical data of the optical imaging lens 5 according to thefifth example embodiment.

As shown in FIG. 22, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the fifth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data and related opticalparameters, such as back focal length; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L4A, L5A1 and L6A1 facing to the object side A1 andthe image-side surfaces L1A2, L2A2, L3A2, L4A2, L5A2 and L6A2 facing tothe image side A2, and positive or negative configuration of therefracting power of each lens element may be similar to those in thefirst embodiment. Please refer to FIG. 24 for the opticalcharacteristics of each lens elements in the optical imaging lens 5 ofthe present embodiment, please refer to FIGS. 46 and 47 for the valuesof (T1+G12+T2)/T5, V5/n5, V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5),EFL/(T1+G12), EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45),EFL/T5, HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 23(A), the offsetof the off-axis light relative to the image point may be within about−0.02˜0.012 mm. As the curvature of field in the sagittal directionshown in FIG. 23(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.04˜0.02 mm. Asthe curvature of field in the tangential direction shown in FIG. 23(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.02˜0.05 mm. As shown in FIG. 23(D), thevariation of the distortion aberration may be within about −18˜2%.

The measurement of focal shift of the optical imaging lens 5 may be−0.0077 mm (at 60° C.) and −0.0004 mm (at 0° C.), where 0 mm is measuredat 20° C., deemed as reference temperature. According to the values ofthe aberrations, it is shown that the optical imaging lens 5 of thepresent embodiment, with the HFOV as large as about 62.666 degrees, Fnoas small as 2.019 and the system length as short as about 5.139 mm, maybe capable of providing good imaging quality, optical characteristicsand thermal stability. Compared with the optical imaging lens 1 of thefirst embodiment, the HFOV may be greater and system length of theoptical imaging lens 5 in the present embodiment may be shorter.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 6 having six lenselements of the optical imaging lens according to a sixth exampleembodiment. FIG. 27 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 6 according to the sixth embodiment. FIG. 28 shows an example tableof optical data of each lens element of the optical imaging lens 6according to the sixth example embodiment. FIG. 29 shows an exampletable of aspherical data of the optical imaging lens 6 according to thesixth example embodiment.

As shown in FIG. 26, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the sixth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the image-side surfaces L4A2 and L5A2; but the configuration ofthe concave/convex shape of surfaces, comprising the object-sidesurfaces L1A1, L2A1, L3A1, L4A1, L5A1 and L6A1 facing to the object sideA1 and the image-side surfaces L1A2, L2A2, L3A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: a periphery region L4A2P on the image-side surfaceL4A2 of the fourth lens element L4 may be convex, and a periphery regionL5A2P on the image-side surface L5A2 of the fifth lens element L5 may beconcave. Please refer to FIG. 28 for the optical characteristics of eachlens elements in the optical imaging lens 6 of the present embodiment,please refer to FIGS. 48 and 49 for the values of (T1+G12+T2)/T5, V5/n5,V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12),EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5,HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 27(A), the offsetof the off-axis light relative to the image point may be within about−0.02˜0.012 mm. As the curvature of field in the sagittal directionshown in FIG. 27(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.04˜0.04 mm. Asthe curvature of field in the tangential direction shown in FIG. 27(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.02˜0.08 mm. As shown in FIG. 27(D), thevariation of the distortion aberration may be within about −9˜5%.

The focal shift of the optical imaging lens 6 may be slightly changedbetween −0.0053 mm (at 60° C.) and 0.0006 mm (at 0° C.), where 0 mm ismeasured at 20° C., deemed as reference temperature. According to thevalues of the aberrations, it is shown that the optical imaging lens 6of the present embodiment, with the HFOV as large as about 60.622degrees, Fno as small as 2.019 and the system length as short as about5.362 mm, may be capable of providing good imaging quality, opticalcharacteristics and thermal stability. Compared with the firstembodiment, the system length of the optical imaging lens 6 in thepresent embodiment may be shorter.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 7 having six lenselements of the optical imaging lens according to a seventh exampleembodiment. FIG. 31 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 7 according to the seventh embodiment. FIG. 32 shows an exampletable of optical data of each lens element of the optical imaging lens 7according to the seventh example embodiment. FIG. 33 shows an exampletable of aspherical data of the optical imaging lens 7 according to theseventh example embodiment.

As shown in FIG. 30, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the seventh embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surface L4A1; but the configuration of theconcave/convex shape of surfaces, comprising the object-side surfacesL1A1, L2A1, L3A1, L5A1 and L6A1 facing to the object side A1 and theimage-side surfaces L1A2, L2A2, L3A2, L4A2, L5A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: an optical region L4A1C on the object-side surfaceL4A1 of the fourth lens element L4 may be concave. Please refer to FIG.32 for the optical characteristics of each lens elements in the opticalimaging lens 7 of the present embodiment, please refer to FIGS. 48 and49 for the values of (T1+G12+T2)/T5, V5/n5, V3/n3,(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12), EFL/(T1+G45),EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5, HFOV/ImgH, HFOV/TTL,HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL, (T6+G12+G34)*Fno/T1,(T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2), (T6+G34+G56)/G23 and Gmax/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 31(A), the offsetof the off-axis light relative to the image point may be within about−0.045˜0.03 mm. As the curvature of field in the sagittal directionshown in FIG. 31(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.05˜0.05 mm. Asthe curvature of field in the tangential direction shown in FIG. 31(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.05˜0.10 mm. As shown in FIG. 31(D), thevariation of the distortion aberration may be within about −20˜15%.

The measurement focal shift of the optical imaging lens 7 may be −0.0045mm (at 60° C.) and −0.0015 mm (at 0° C.), where 0 mm is measured at 20°C., deemed as reference temperature. According to the values of theaberrations, it is shown that the optical imaging lens 7 of the presentembodiment, with the HFOV as large as about 62.500 degrees, Fno as smallas 2.019 and the system length as short as about 5.964 mm, may becapable of providing good imaging quality, optical characteristics andthermal stability. Compared with the first embodiment, the HFOV may begreater and the system length of the optical imaging lens 7 in thepresent embodiment may be shorter.

Reference is now made to FIGS. 34-37. FIG. 34 illustrates an examplecross-sectional view of an optical imaging lens 8 having six lenselements of the optical imaging lens according to an eighth exampleembodiment. FIG. 35 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 8 according to the eighth embodiment. FIG. 36 shows an exampletable of optical data of each lens element of the optical imaging lens 8according to the eighth example embodiment. FIG. 37 shows an exampletable of aspherical data of the optical imaging lens 8 according to theeighth example embodiment.

As shown in FIG. 34, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the eighth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, the configuration of the concave/convex shapeof the object-side surface L5A1, and the negative refracting power ofthe second lens element L2; but the configuration of the concave/convexshape of surfaces comprising the object-side surfaces L1A1, L2A1, L3A1,L4A1 and L6A1 facing to the object side A1 and the image-side surfacesL1A2, L2A2, L3A2, L4A2, L5A2 and L6A2 facing to the image side A2, andpositive or negative configuration of the refracting power of the lenselement other than the second lens element L2 may be similar to those inthe first embodiment. Specifically, the differences of configuration ofsurface shape may include: an optical axis region L5A1C on theobject-side surface L5A1 of the fifth lens element L5 may be convex.Please refer to FIG. 36 for the optical characteristics of each lenselements in the optical imaging lens 8 of the present embodiment, andplease refer to FIGS. 48 and 49 for the values of (T1+G12+T2)/T5, V5/n5,V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12),EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5,HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 35(A), the offsetof the off-axis light relative to the image point may be within about−0.012˜0.010 mm. As the curvature of field in the sagittal directionshown in FIG. 35(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.03˜0.03 mm. Asthe curvature of field in the tangential direction shown in FIG. 35(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.03˜0.06 mm. As shown in FIG. 35(D), thevariation of the distortion aberration may be within about −14˜6%.Compared with the first embodiment, the longitudinal sphericalaberration may be smaller here.

The measurement of focal shift of the optical imaging lens 8 may be−0.0062 mm (at 60° C.) and −0.0005 mm (at 0° C.), where 0 mm is measuredat 20° C., deemed as reference temperature. According to the values ofthe aberrations, it is shown that the optical imaging lens 8 of thepresent embodiment, with the HFOV as large as about 60.874 degrees, Fnoas small as 2.019 and the system length as short as about 5.831 mm, maybe capable of providing good imaging quality, optical characteristicsand thermal stability. Compared with the first embodiment, the HFOV maybe greater and the system length of the optical imaging lens 8 in thepresent embodiment may be shorter.

Reference is now made to FIGS. 38-41. FIG. 38 illustrates an examplecross-sectional view of an optical imaging lens 9 having six lenselements of the optical imaging lens according to a ninth exampleembodiment. FIG. 39 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 9 according to the ninth embodiment. FIG. 40 shows an example tableof optical data of each lens element of the optical imaging lens 9according to the ninth example embodiment. FIG. 41 shows an exampletable of aspherical data of the optical imaging lens 9 according to theninth example embodiment.

As shown in FIG. 38, the optical imaging lens 9 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the ninth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, the configuration of the concave/convex shapeof the object-side surfaces L4A1, L5A1 and the image-side surface L5A2,and the positive refracting power of the sixth lens element L6; but theconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces L1A1, L2A1, L3A1 and L6A1 facing to the object sideA1 and the image-side surfaces L1A2, L2A2, L3A2, L4A2 and L6A2 facing tothe image side A2, and positive or negative configuration of therefracting power of the lens element other than the sixth lens elementL6 may be similar to those in the first embodiment. Specifically, thedifferences of configuration of surface shape may include: an opticalaxis region L4A1C on the object-side surface L4A1 of the fourth lenselement L4 may be concave, an optical axis region L5A1C on theobject-side surface L5A1 of the fifth lens element L5 may be convex, anda periphery region L5A2P on the image-side surface L5A2 of the fifthlens element L5 may be concave. Please refer to FIG. 40 for the opticalcharacteristics of each lens elements in the optical imaging lens 9 ofthe present embodiment, please refer to FIGS. 48 and 49 for the valuesof (T1+G12+T2)/T5, V5/n5, V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5),EFL/(T1+G12), EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45),EFL/T5, HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 39(A), the offsetof the off-axis light relative to the image point may be within about−0.02˜0.008 mm. As the curvature of field in the sagittal directionshown in FIG. 39(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.02˜0.03 mm. Asthe curvature of field in the tangential direction shown in FIG. 39(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about 0.04˜0.07 mm. As shown in FIG. 39(D), thevariation of the distortion aberration may be within about −20˜10%.

The focal shift of the optical imaging lens 9 may be slightly changedbetween −0.0055 mm (at 60° C.) and 0.0003 mm (at 0° C.), where 0 mm ismeasured at 20° C., deemed as reference temperature. According to thevalues of the aberrations, it is shown that the optical imaging lens 9of the present embodiment, with the HFOV as large as about 64.617degrees, Fno as small as 1.907 and the system length as short as about5.913 mm, may be capable of providing good imaging quality, opticalcharacteristics and thermal stability. Compared with the firstembodiment, the aperture and HFOV may be greater and the system lengthof the optical imaging lens 9 in the present embodiment may be shorter.

Reference is now made to FIGS. 42-45. FIG. 42 illustrates an examplecross-sectional view of an optical imaging lens 10 having six lenselements of the optical imaging lens according to a tenth exampleembodiment. FIG. 43 shows example charts of a longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 10 according to the tenth embodiment. FIG. 44 shows an exampletable of optical data of each lens element of the optical imaging lens10 according to the tenth example embodiment. FIG. 45 shows an exampletable of aspherical data of the optical imaging lens 10 according to thetenth example embodiment.

As shown in FIG. 42, the optical imaging lens 10 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, may comprise a first lens element L1, a second lenselement L2, an aperture stop STO, a third lens element L3, a fourth lenselement L4, a fifth lens element L5 and a sixth lens element L6.

The differences between the tenth embodiment and the first embodimentmay include the radius of curvature and thickness of each lens element,the value of each air gap, aspherical data, related optical parameters,such as back focal length, and the configuration of the concave/convexshape of the object-side surfaces L4A1 and L5A1; but the configurationof the concave/convex shape of surfaces, comprising the object-sidesurfaces L1A1, L2A1, L3A1 and L6A1 facing to the object side A1 and theimage-side surfaces L1A2, L2A2, L3A2, L4A2, L5A2 and L6A2 facing to theimage side A2, and positive or negative configuration of the refractingpower of each lens element may be similar to those in the firstembodiment. Specifically, the differences of configuration of surfaceshape may include: an optical axis region L4A1C on the object-sidesurface L4A1 of the fourth lens element L4 may be concave, and anoptical axis region L5A1C on the object-side surface L5A1 of the fifthlens element L5 may be convex. Further, in the present embodiment, thethird lens element L3 is made by glass, and the fifth lens element L5 ismade by plastic material. Please refer to FIG. 44 for the opticalcharacteristics of each lens elements in the optical imaging lens 10 ofthe present embodiment, and please refer to FIGS. 48 and 49 for thevalues of (T1+G12+T2)/T5, V5/n5, V3/n3,(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5), EFL/(T1+G12), EFL/(T1+G45),EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45), EFL/T5, HFOV/ImgH, HFOV/TTL,HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL, (T6+G12+G34)*Fno/T1,(T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2), (T6+G34+G56)/G23 and Gmax/G min of the present embodiment.

As the longitudinal spherical aberration shown in FIG. 43(A), the offsetof the off-axis light relative to the image point may be within about−0.006˜0.012 mm. As the curvature of field in the sagittal directionshown in FIG. 43(B), the focus variation with regard to the threewavelengths in the whole field may fall within about −0.02˜0.020 mm. Asthe curvature of field in the tangential direction shown in FIG. 43(C),the focus variation with regard to the three wavelengths in the wholefield may fall within about −0.02˜0.035 mm. As shown in FIG. 43(D), thevariation of the distortion aberration may be within about −25˜5%.Compared with the first embodiment, the curvature of field in both thesagittal and tangential directions of the optical imaging lens 10 in thepresent embodiment may be smaller.

The focal shift of the optical imaging lens 10 may be slightly changedbetween −0.0263 mm (at 60° C.) and 0.0123 mm (at 0° C.), where 0 mm ismeasured at 20° C., deemed as reference temperature. According to thevalues of the aberrations, it is shown that the optical imaging lens 10of the present embodiment, with the HFOV as large as about 63.305degrees, Fno as small as 2.020 and the system length as short as about5.713 mm, may be capable of providing good imaging quality, opticalcharacteristics and thermal stability. Compared with the firstembodiment, the HFOV may be greater and the system length of the opticalimaging lens 10 in the present embodiment may be shorter.

Please refer to FIGS. 46, 47, 48 and 49 for the values of(T1+G12+T2)/T5, V5/n5, V3/n3, (T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5),EFL/(T1+G12), EFL/(T1+G45), EFL/(T1+G56), EFL/(T2+G23), EFL/(T3+G45),EFL/T5, HFOV/ImgH, HFOV/TTL, HFOV/TL, ImgH*Fno/ALT, AAG*Fno/BFL,(T6+G12+G34)*Fno/T1, (T1+G23+G45+G56)/T6, (G23+T3+G34+T4)/(G12+T2),(T6+G34+G56)/G23 and G max/G min of all ten embodiments, and the opticalimaging lens of the present disclosure may satisfy at least one of theInequality (1) and/or Inequalities (2)˜(20). Further, any range of whichthe upper and lower limits defined by the values disclosed in all of theembodiments herein may be implemented in the present embodiments.

According to above illustration, the longitudinal spherical aberration,curvature of field in both the sagittal direction and tangentialdirection and distortion aberration in all embodiments may meet the userrequirement of a related product in the market. The off-axis light withregard to three different wavelengths (470 nm, 555 nm, 650 nm) may befocused around an image point and the offset of the off-axis lightrelative to the image point may be well controlled with suppression forthe longitudinal spherical aberration, curvature of field both in thesagittal direction and tangential direction and distortion aberration.The curves of different wavelengths may be close to each other, and thisrepresents that the focusing for light having different wavelengths maybe good to suppress chromatic dispersion. In summary, lens elements aredesigned and matched for achieving good imaging quality.

While various embodiments in accordance with the disclosed principlesare described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof example embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages. Further, all of the numerical ranges including the maximumand minimum values and the values therebetween which are obtained fromthe combining proportion relation of the optical parameters disclosed ineach embodiment of the present disclosure are implementable.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens, comprising a firstelement, a second element, a third element, a fourth element, a fifthlens element and a sixth lens element sequentially from an object sideto an image side along an optical axis, each of the first, second,third, fourth, fifth and sixth lens elements having an object-sidesurface facing toward the object side and allowing imaging rays to passthrough and an image-side surface facing toward the image side andallowing the imaging rays to pass through, wherein: the first lenselement has negative refracting power, and a periphery region of theobject-side surface of the first lens element is convex; a peripheryregion of the image-side surface of the third lens element is convex;the fourth lens element has negative refracting power; a peripheryregion of the object-side surface of the fifth lens element is convex; aperiphery region of the object-side surface of the sixth lens element isconcave, and a periphery region of the image-side surface of the sixthlens element is convex; lens elements having refracting power of theoptical imaging lens consist of the six lens elements described above;and a thickness of the first lens element along the optical axis isrepresented by T1, a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis is represented by G12, a thickness of the second lenselement along the optical axis is represented by T2, a thickness of thefifth lens element along the optical axis is represented by T5, an abbenumber of the fifth lens element is represented by V5, a refractiveindex of the fifth lens element is represented by n5, an abbe number ofthe third lens element is represented by V3, a refractive index of thethird lens element is represented by n3, and the optical imaging lenssatisfies the inequalities:(T1+G12+T2)/T5≤1.400; and at least one of V5/n5≤34.000 and V3/n3≤34.000.2. The optical imaging lens according to claim 1, wherein an effectivefocal length of the optical imaging lens is represented by EFL, and EFL,T1 and G12 satisfy the inequality:EFL/(T1+G12)≤2.600.
 3. The optical imaging lens according to claim 1,wherein an effective focal length of the optical imaging lens isrepresented by EFL, a distance from the image-side surface of the secondlens element to the object-side surface of the third lens element alongthe optical axis is represented by G23, and EFL, T2 and G23 satisfy theinequality:EFL/(T2+G23)≤2.600.
 4. The optical imaging lens according to claim 1,wherein a half field of view angle of the optical imaging lens isrepresented by HFOV, an image height of an image produced by the opticalimaging lens on an image plane is represented by ImgH, and HFOV and ImgHsatisfy the inequality:HFOV/ImgH≥20.000°/mm.
 5. The optical imaging lens according to claim 1,wherein an image height of an image produced by the optical imaging lenson an image plane is represented by ImgH, a f-number of the opticalimaging lens is represented by Fno, a sum of the thicknesses of all sixlens elements along the optical axis is represented by ALT, and ImgH,Fno and ALT satisfy the inequality:ImgH*Fno/ALT≤1.900.
 6. The optical imaging lens according to claim 1,wherein a distance from the image-side surface of the second lenselement to the object-side surface of the third lens element along theoptical axis is represented by G23, a distance from the image-sidesurface of the fourth lens element to the object-side surface of thefifth lens element along the optical axis is represented by G45, adistance from the image-side surface of the fifth lens element to theobject-side surface of the sixth lens element along the optical axis isrepresented by G56, a thickness of the sixth lens element along theoptical axis is represented by T6, and T1, G23, G45, G56 and T6 satisfythe inequality:(T1+G23+G45+G56)/T6≤3.300.
 7. The optical imaging lens according toclaim 1, wherein a thickness of the third lens element along the opticalaxis is represented by T3, a distance from the image-side surface of thethird lens element to the object-side surface of the fourth lens elementalong the optical axis is represented by G34, a thickness of the fourthlens element along the optical axis is represented by T4, a distancefrom the image-side surface of the fourth lens element to theobject-side surface of the fifth lens element along the optical axis isrepresented by G45, a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by G56, a thickness of the sixth lenselement along the optical axis is represented by T6, a f-number of theoptical imaging lens is represented by Fno, a thickness of the thirdlens element along the optical axis is represented by T3, and T3, G34,T4, G45, T5, G56, T6, Fno, T3 and T5 satisfy the inequality:(T3+G34+T4+G45+T5+G56+T6)*Fno/(T3+T5)≤4.400.
 8. The optical imaging lensaccording to claim 1, wherein: an optical axis region of the image-sidesurface of the third lens element is convex; and the optical imaginglens satisfies the inequalities:(T1+G12+T2)/T5≤1.400; andV5/n5≤34.000.
 9. The optical imaging lens according to claim 8, whereinan effective focal length of the optical imaging lens is represented byEFL, a distance from the image-side surface of the fourth lens elementto the object-side surface of the fifth lens element along the opticalaxis is represented by G45, and EFL, T1 and G45 satisfy the inequality:EFL/(T1+G45)≤5.000.
 10. The optical imaging lens according to claim 8,wherein an effective focal length of the optical imaging lens isrepresented by EFL, a thickness of the third lens element along theoptical axis is represented by T3, a distance from the image-sidesurface of the fourth lens element to the object-side surface of thefifth lens element along the optical axis is represented by G45, andEFL, T3 and G45 satisfy the inequality:EFL/(T3+G45)≤2.200.
 11. The optical imaging lens according to claim 8,wherein a half field of view angle of the optical imaging lens isrepresented by HFOV, a distance from the object-side surface of thefirst lens element to an image plane along the optical axis isrepresented by TTL, and HFOV and TTL satisfy the inequality:HFOV/TTL≥9.000°/mm.
 12. The optical imaging lens according to claim 8,wherein a sum of a distance from the image-side surface of the firstlens element to the object-side surface of the second lens element alongthe optical axis, a distance from the image-side surface of the secondlens element to the object-side surface of the third lens element alongthe optical axis, a distance from the image-side surface of the thirdlens element to the object-side surface of the fourth lens element alongthe optical axis, a distance from the image-side surface of the fourthlens element to the object-side surface of the fifth lens element alongthe optical axis and a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by AAG, a f-number of the opticalimaging lens is represented by Fno, a distance from the image-sidesurface of the sixth lens element to an image plane along the opticalaxis is represented by BFL, and AAG, Fno and BFL satisfy the inequality:AAG*Fno/BFL≤3.100.
 13. The optical imaging lens according to claim 8,wherein a distance from the image-side surface of the second lenselement to the object-side surface of the third lens element along theoptical axis is represented by G23, a thickness of the third lenselement along the optical axis is represented by T3, a distance from theimage-side surface of the third lens element to the object-side surfaceof the fourth lens element along the optical axis is represented by G34,a thickness of the fourth lens element along the optical axis isrepresented by T4, and G23, T3, G34, G12 and T2 satisfy the inequality:(G23+T3+G34+T4)/(G12+T2)≤2.800.
 14. The optical imaging lens accordingto claim 8, wherein in a distance from the image-side surface of thefirst lens element to the object-side surface of the second lens elementalong the optical axis, a distance from the image-side surface of thesecond lens element to the object-side surface of the third lens elementalong the optical axis, a distance from the image-side surface of thethird lens element to the object-side surface of the fourth lens elementalong the optical axis, a distance from the image-side surface of thefourth lens element to the object-side surface of the fifth lens elementalong the optical axis and a distance from the image-side surface of thefifth lens element to the object-side surface of the sixth lens elementalong the optical axis, the one having a maximum value is represented byGmax and the one having a minimum value is represented by Gmin, and Gmaxand Gmin satisfy the inequality:G max/G min≤11.000.
 15. The optical imaging lens according to claim 1,wherein: an optical axis region of the image-side surface of the thirdlens element is convex; and the optical imaging lens satisfies theinequalities:(T1+G12+T2)/T5≤1.400; andV3/n3≤34.000.
 16. The optical imaging lens according to claim 15,wherein an effective focal length of the optical imaging lens isrepresented by EFL, a distance from the image-side surface of the fifthlens element to the object-side surface of the sixth lens element alongthe optical axis is represented by G56, and EFL, T1 and G56 satisfy theinequality:EFL/(T1+G56)≤4.100.
 17. The optical imaging lens according to claim 15,wherein an effective focal length of the optical imaging lens isrepresented by EFL, and EFL and T5 satisfy the inequality:EFL/T5≤2.200.
 18. The optical imaging lens according to claim 15,wherein half field of view angle of the optical imaging lens isrepresented by HFOV, a distance from the object-side surface of thefirst lens element to the image-side surface of the sixth lens elementalong the optical axis is represented by TL, and HFOV and TL satisfy theinequality:HFOV/TL≥11.000°/mm.
 19. The optical imaging lens according to claim 15,wherein a thickness of the sixth lens element along the optical axis isrepresented by T6, a distance from the image-side surface of the thirdlens element to the object-side surface of the fourth lens element alongthe optical axis is represented by G34, a f-number of the opticalimaging lens is represented by Fno, and T6, G12, G34, Fno and T1 satisfythe inequality:(T6+G12+G34)*Fno/T1≤6.000.
 20. The optical imaging lens according toclaim 15, wherein a thickness of the sixth lens element along theoptical axis is represented by T6, a distance from the image-sidesurface of the third lens element to the object-side surface of thefourth lens element along the optical axis is represented by G34, adistance from the image-side surface of the fifth lens element to theobject-side surface of the sixth lens element along the optical axis isrepresented by G56, a distance from the image-side surface of the secondlens element to the object-side surface of the third lens element alongthe optical axis is represented by G23, and T6, G34, G56 and G23 satisfythe inequality:(T6+G34+G56)/G23≤2.400.